Listen in as GPI's Ryan Stevens talks about some of the features of our Drop-in Piston/Rod Combo and how we're able to offer a zero-balance package for the Gen V LT market! GPI LT1/L86 Drop-in Piston/Rod Combo https://gwatneyperformance.com/product/gpi-lt1-drop-in-piston-rod-package/ GPI L83 Drop-in Piston/Rod Combo https://gwatneyperformance.com/product/gpi-complete-gen-5-l83-5-3l-drop-in-piston-connecting-rod-package-14-19-silverado-sierra-tahoe-yukon/#configuration | Gwatney Performance Innov
3:49
Listen in as GPI's Ryan Stevens talks about some of the features o…
3.3K viewsFeb 13, 2020
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GPI L83 (5.3) Custom Hi Ram Heads and Cam Package! 😍 | Gwatney Performance Innovation
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GPI L83 (5.3) Custom Hi Ram Heads and Cam Package! 😍 | Gwatney Perf…
28.4K viewsSep 23, 2019
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Another nice truck build! GPI Stage 3 L83 high lift cam kit. L86 intake setup, E85, headers, and a killer converter we have been having Circle D Specialties do for us! https://gwatneyperformance.com/product/gpi-l83-high-lift-cam-install-package-2014-5-3l-direct-injected-gm-truck/ https://gwatneyperformance.com/product/circle-d-6l8090-pro-series-single-disk/ | Gwatney Performance Innovation
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Another nice truck build! GPI Stage 3 L83 high lift cam kit. L86 intake s…
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Behind the scenes peek at GPI, where our in-house CNC machines are putting in work—cutting, shaping, and perfecting our L83 cylinder heads to exact spec🤘 🛠️ Every pass matters. These aren’t cookie-cutter parts—we machine our heads with tight tolerances, consistent flow gains, and proven performance gains for street and strip use. 🔍 Why our CNC-ported L83 heads hit different: ✅ Increased airflow for LS/LT platforms ✅ Optimized combustion efficiency ✅ Designed for boosted or naturally aspirated
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1.5K views10 months ago
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Your factory heads are leaving power on the table 👀 At GPI, we take OEM castings, machine in house, and make them do what they should’ve done from the start: move air. 💨 We put hours of R&D into perfecting our Gen 5 LT CNC program for an end result of 320cc Intake Port Volume and 116cc Exhaust Port Volume 💪🏽 What does that mean for your build? ⬇️ -Improved cylinder fill in the lower RPM range for stronger torque where you need it most -Substantial airflow increases up top to keep pulling har
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2018 GMC Sierra L83 cam swap - Part 4
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